Heel-concaving machine



, E aillmrl 4 Sheets-Smet IIIA'L' lllill'lilllll V lllllllllllllllll J. Wl STAPLES ET AL HEEL CONCAVING MACHINE Filed Nov. 19,

Dec. 18, 1934.

Dec. 18, 1934.. jl-Wl STAPLES ET AL 1,984,900

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. f] A z ofneyg HEEL CONCAVING MACHINE Filed Nov. 19, 1931 4 Sheets-Sheet 3 Dec. 18, 1934. J. w.. STAPLES ET AL v 1,984,900

HEEL CONCAVING MACHINE Filed Nov. 19, 1931 4 SheetS-Shemd 4 /f//ff/ 17/ Ik z/e/z for.'

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Patented Dec. 18, 1934 UNITED STATES 1,984,900 HEEL-ooNcAvING MACHINE John W. Staples,

Haverhill, and Walter C.

Brooks, Groveland, Mass., yassgnors to Pope Machinery Corporation, Haverhill, Mass., a corporation of Massachusetts Application November 19, 1931, serial No. 576,001

2 claims.L (o1. 12--4m a in the above `mentioned application comprises ay stationary support havingy a slot .through which projects a rotating cutter. A heel guide is carried upon the support and extends over the slot adjacent the edge of the cutter to engage the edge of the seat of a heel While it is being' moved over the cutter. A heavy arm is pivotally mounted upon the machine and isr provided with J ,twospaced surfaces substantially parallel to the support between which slides a cam or pattern having a portion which corresponds substantially with the edge contour formed by the back vand, sides of .the heel seat. This cam carries means for holding a wood heel. The cam is rotated while being `guided to cause the heel to move in engagement with the cutter along a path substantially parallel to the edge contour .of the heel seat., A resilient pressure actsvr upon the pivotedarm to maintain the edge of the seat. of the heel in engagement with the heel ,guide while the heel is engaging the cutter. The concaving operation as performed by these machines Ileavesa central ridge inthe seat of the wood heel vwhich must be removed by a subse- `quent operation. Y

It is the object of the presentv invention to provide amachine of the general type described in the above' mentioned .copending applications which is adapted to perform the concaving. operation so as to leave asmooth cavity unbroken by a ridge. 1 yThe invention -will be more clearly understood Afrom the following description in conjunction with the accompanying drawings, in which Fig. 1 is a side elevational view, partly broken away, of a machine embodying the invention.

Fig. `2 is a frontv elevational view of the same --partly broken away. y f ,Figi 3 is av sectional view taken upon the line 3-3fof. Fig.- 1 partlybroken away.

y Fig-4 's a vdetail plan Viewv of aportion of the machine. Y n

Figs. 6and 7 are detail views showing the relation between 4.the `cutter and thev heel during 4themovementof the latter, and u Figsand 9 are views s imilargto Figs. 6` and-7, respectively, showing amcutterof modified form.

Before explaining in detail Athe'present invention, it islto. Vbe understood that theinventiongis not limited in its application to ther detailsmof construction and arrangement of parts.` illus-'- trated in the accompanying drawings, since the invention is capable of other embodir'nents and of being practised or carried out in various ways. Also kit is to be understood that the phraseology d or terminology employed herein is for the purpose of description and not of limitation, and it is not intended to limit the invention beyond the terms of the several claims hereto appended as considered in view of the prior art and the requirements thereof. y

The machine illustrated inthe accompanying drawings comprises a frame 10 carrying a stationary support 11. A shaft 12 carrying a cute ,i5 ter 17 is rotatably mounted in suitable bearings in a bracket 13 adjustably carried by a bracket 14 secured to the frame 10. The cutter 17 projects through an elongated slot 18 in the support 11. A heel guide 9 is `adjustably mounted 20 upon the support 11 in any suitable manner` so that its edge projects over the slot 18. and terminates adjacent the edge of thecutter 17.* A pulley 20 is suitably fixed upon the shaft 12 and is connected with a pulley 21 carried by the armature shaft of the motor 14 by-a belt 2 2; ,g

A vertical shaft 23 is rotatably mounted in-'a sleeve 24 fixed in the frame 10 and is provided at its lower end with a worm AWheel25 adapted to'engager a Worm 26 upon the armaturevshaft ,2.0 of a motor 27. A disc 29 having a conical'periphery is suitably fixed on theshaft 23 near its rother end. A pulley 32 slidably lmounted upon the shaft 23 above the disc 29 carries a friction clutch 31 adapted to engage the disc 29 and connect the shaft 23 and pulley 32.

A stationary arm -35 is fixed uponthe sleeve 24 and supports ball bearings 36'adapted toenf gage anvarmv 37 pivotally mounted on the sleeve 24. The free end of the arm .37 is `provided ,40 with spaced shelves `38 and 39 substantially parallel to the support 11 and between` which a cam. or palttern 40- is slidably Vmounted. A spring` 148 connected at one end to the arm 37 and at its other end to a kscrew 149, 4adjustably mounted in a lug extending upwardly from the stationary arm 35, is adapted normally to .hold the arm 37' inengagement with a stop 152 radjustably mounted in the lug 150.

Thev cam 40 is formed `with a body portion 41 having a yi continuous wall 43. extending upwardly from the edge thereof. Teeth` 42 areprovided nearthe bottomfof the outersurface-of the wall 43 and are adapted to,y engage a pinion 44 4carried-by .fa-shaft 45 rotatably mounted in suitable bear'- f ings upon the arm 37. A pulley 46 is rotatably mounted upon a shaft 45 and is connected with the pulley 32 by a belt 47. An arm 48 is suitably secured to the shaft 45 and is provided at one end with an operating handle 49. A pin 50 is slidably mounted in the other end of the arm 48 and is adapted to be detachably received in an opening 51 in the pulley 46 thereby operatively connecting the shaft 45 and pulley 46.

A guide roll 53 is rotatably mounted in the arm 37 to engage the upper outer surface of the wall 43 above the teeth 42. The cam 40 is held in engagement with the pinion 44 and guide 53 by a roll 54 engaging the inner surface of the wall 43 and pivotally mounted on one arm of a three armed lever 55. The inner wall of the pattern 40 is provided with a depression 151 for a purpose described hereinafter. The lever 55 is pivotally mounted at an intermediate point upon the arm 37 and its arm 55a is connected to one end of a spring 56, the other end of which is secured to a bolt 57 adjustably mounted in a lug carried by the arm 37.

Spaced rods 70 are adjustably carried by the body portion 41 of the cam 40 and extend downwardly therefrom toward the support 1l. A bracket 72 extends between the rods 70 and is suitably secured thereto. A heel gauge 73 is adjustably mounted in guideways 74 in the bracket 72 and is held in adjusted position by a screw 75 engaging the same passing through one of a plurality of openings 76 in a cover plate 77 suitably xed upon the bracket 72 as by screws 78. A plunger 80 is slidably mounted in suitable guideways 81 in the gauge 73 and is held therein by the cover plate 77. A roll 83 is pivotally mounted on one end of the plunger 80. The sides of the plunger 80 are provided with high and low cam surfaces 85 and 86 adjacent the roll 83 and are adapted to be engaged by rolls 87 pivotally mounted upon one end of levers 88 pivotally carried by the rods 70. A rod 90 is slidably mounted in each of a pair of spaced bushings 91 pivotally mounted upon the bracket 72. One end of each of the rods is provided with a bearing 94 pivotally engaging a pin 92 on the plunger 80. A spring 93 surrounds each of the rods 90 with one end engaging the bushing 91 and its other end engaging the bearing 94. A pair of springs 95 connect the arms 88 and the bushings 91. A roll 98 is pivotally mounted on a bracket 96 extending between and suitably secured upon the rods 70.

The other end of each of the arms 88 is provided with a split bushing 99 adapted to receive a rod 100 which is secured in desired adjusted position therein by a bolt 101. One end of each rod 100 is split to provide a clamping portion 102 integral with the rod and a clamping portion 103 detachably mounted thereon by a bolt 104. Each of a pair of spaced tapped holes 105 and 106 are formed partly in each of the clamping portions 103 and 104 in which threaded heel engaging members 107 and 108 respectively are adjustably secured.

An arm 110 is fixed upona shaft 111 carried by a bracket 112 extending laterally from the arm 37. The arm 110 is xed in adjusted position upon the bracket 112 by a nut 113 threaded upon the upper end of the shaft 111 and engaging the bracket. An arm 115 is pivotally mounted at an intermediate point upon the shaft 111 and is provided with an abutment 116 adapted to engage a stop 117 on the arm 110. The abutment 116 normally is held in engagement with the stop 117 by a spring 118 one end of which is connected to the end of the arm 115 and the other end of which is connected to a screw 119 adjustably mounted in the end of the arm 110. A projection 120 extends from the lower side of the other end of the arm 115 and is positioned in the plane of movement of the roll 83 carried by the plunger 80 and is adapted to swing beneath the roll 98.

A foot treadle is pivotally mounted at an intermediate point in a bracket 126 and is connected at one end to one end of a vertically extending rod 127. The other end of the rod 127 is pivotally connected near one end of a lever 128 which is pivotally mounted at an intermediate point upon a pin 129 carried by a bracket 130 extending upwardly from the arm 37 The other end of the lever 128 is provided with a pair of forked arms 131 each carrying a roll 132 adapted to engage the bottom edge of the clutch 31. A spring 134 connected at one end to the lever 128 and connected at its other end to the frame 10 normally holds the clutch 31 out of engagement with the disk 29. Toggle links 135 and 136 are pivotally connected at one end to a rod 137. The other end of the link 136 is pivotally carried by the arm 37 and the other end of the link 135 is provided with an elongated slot 138 adapted to receive a pin 139 carried by the lever 128. The rod 137 extends through and is slidably mounted in an opening 140 and in an arm 141 forming one arm of the three arm lever55. A spring 142 surroundsV the rod 137 with one end in engagement with the arm 141 and its other end in engagement with a collar 143 adjustably mounted upon the rod 137. A pin 145 is fixed upon the rod 137 adjacent the arm 141.

In the operation of the machine the motors are actuated to rotate the cutter 17 and shaft 23 carrying the disk 29 respectively. A heel W is then placed upon the supportll and moved into engagement with the end of the plunger 80. Further movement of the heel causes the plunger to move rearwardly carrying the rods 90 past dead center, whereupon the springs 93 act to move the plunger to its rearward position. During the rearward movement of the plunger lthe rolls 87 move from the low cam surfaces 86 to the high cam surfaces 85 causing the arms 88 to swing about the rod 70 to bring the heel engaging members 107 and 108 into engagement with the heel W to hold the same against the support 11 and heel gauge 73.

VThe foot treadle 125 is actuated to cause the rolls 132 carried by the lever 128 to move, downwardly thereby permitting the clutch' 31 carried by the pulley 32 to drop into frictional engagement with the disk 29, thereby completing driving connection between the motor 27 and the pattern 40. The movement of the lever 128 straightens the toggle formed by the links 135 and 136 so as to maintain the clutch 31 in engagement with the disk 29. The portion 5 of the pattern 40 is shaped to correspond substantially to the edge contour of the seat of the heel W so that when the pattern 40 is moved the heel W will be moved to bring it in engagement with the cutter 17 along a path substantially parallel to the edge contour of the heel seat extending around the sides and back of the heel from one side of Athebreast to the other side of the breast. During this movement the edge of the heel is pressed against the guide 9 by the action of ythe spring 148. The remaining portion 4 of the pattern 40 is shaped so that after the heel has been concaved it is returned quickly to its initial position through a path out of range `of the cutter.

When the pattern has moved to return the heel to substantially its initial position the roll 54 drops into the depression 151 in the inner surface oi' the wall of thepattern 40 causing the arm 151 to swing into engagement with the pin 145 to move the rod 137 and break the toggle and permit the spring 134 to actuate the lever 128 and to move the clutch 31 out of engagement with the disk 29. In this manner, the driving connection between the motor 27 `and pattern 40 is automatically broken to stop the movement of the pattern. Just before the heel has returned to its initial position the roll 98 engages the arm to swing it against the action of the spring 118. At about the time the heel has returned to its initial position, the roll 98 rides off the end of the arm 115 thereby permitting the tension in the spring 118 to swing the projection 120 into engagement with the roll S3 to move the plunger 80 forwardly to eject the heel. During the forward movement of the plunger 80, the rolls 87 ride 01T the high cam surfaces 95 to swing the heel engaging members 107 and 108 out of engagement with the heel.

The cutter 17 is shaped so that the operative portion of its proiile corresponds to the cross sectional shape of the edge portion of the desired cavity to be produced, and extends across more than half of the width of the heel. The arrangement is such that as the heel is moved in engagement with the cutter, the axis of the cutter is disposed in a plane transverse to the edge contour of the heel and, preferably, perpendicular thereto. Consequently, as the heel is moved over the cutter in the manner described a smooth cavity unbroken by a ridge is formed. The axis of the cutter may be inclined with respect to a plane through the edge contour of the heel, but its inclination should be less than 90. In Figs. 8 and 9 a cutter 17 of modified shape is shown, the .operative portion of which has a straight portion adapted to produce a centrally fiattened area in the Ibottom of the cavity inthe seat of the heel.

We claim:

1. In a machine for concaving Wood heels, in combination, a cutter, means for holding a heel, means for actuating one of said members so as to cause the cutter to engage the heel along a path parallel to the edge contour of the heel during whichi'actuation the axis of the cutter is positioned in a plane transverse to said edge contour, said axis being disposed at an angle of less than 90 to a plane through said edge contour.

2. In a machine for concaving wood heels, in combination, a cutter, means for holding a heel, means for actuating one of said members so as to cause the cutter to engage the heel along a path parallel to the edge contour ofthe heel during which actuation the axis of the cutter is positioned in a plane transverse to said edge contour, said plane being perpendicular to a plane through said edge contour, said axis being disposed at an angle of less than 90 to the plane through said edge contour, the operative portion of the profile of the cutter corresponding to the cross sectional shape of the edge portion of the desired cavity to be produced and extending across more than half the width of the heel.

JOHN W. STAPLES. WALTER C. BROOKS. 

